When I looked at your posting without reading the text I automatically thought "Ky-ra"... so I would definitely use the spelling
Kira. There aren't that many
Kira's in the world so I wouldn't worry about it not looking interesting. Regarding mn's... I like
Jade or
Lorelei but in this case I think that the flow is off for the two together. That said, I would go with:
Kira Lorelei or
Kira Jade
Some favorites...
Aidan Charles Henry Noah Peter
Audrey Caroline Carys Estella Josephine Natalie